Fatigue behavior and life predictions of notched specimens made of QT and forged microalloyed steels


Fatigue behavior of notched specimens was investigated using circumferentially notched round bar and double-notched flat plate geometries, each with different stress concentration factors. Specimens were made of a commonly used vanadium-based microalloyed forging steel, in both the as-forged and quenched and tempered (QT) conditions. The effects of different notch severities and constraint conditions (i.e. plane stress versus plane strain) on fatigue behavior, and the ability of S-N and strain-life approaches to correlate and predict the experimental data are examined. Notched fatigue behavior of the microalloyed steel is evaluated and compared with its QT counterpart. © 2003 Elsevier Ltd. All rights reserved.

Publication Title

International Journal of Fatigue